Concrete form clamp



May 22, 1945- A G. HfsTRoBEN CONCRETE FORM CLAMP original Filed Jan. 9,'194s I I I 1 ENTOR. ge# 'oben regi.

10p v n 75' 6 6290/' BYW as e straps '2.-

Ressued May 22, 1945 UNITED STATE-s PATENT. oFFic-E ooNcnE'rE FORM CLAMPGeorge Il. S'troben, Detroit,`Mich. original No. 21,340,439, datedFebruary 1,d 1944,

Serial` No.f471,857, January 9,.1g94, 3. Applica-V tion for reissueJanuary 31, 1945, Serial No.

13 Claims.

This invention relates to clamping means for concrete forms. i

All sorts of clamps have been proposed and used for clamping the planksor boards together for the concrete form into which the pour is made forconstructing concrete Walls for buildings, fortifications and all kindsof monolithic structures'. It is the object of the present invention toprovide aclamping system which` involvessimplicity, economy and facilityin puts ting the same together. This system is particu-` lalfly'elective as means is also afforded for providlng additional clampingmeans for tightening or straightening portions of theY concrete form incase the normal clamping means has left por# f tions ofthe' concreteform out of the desired position. This will be more fully explained inthe detailedl specication following.

Referring to the drawing:

Fig. lis a; fragmentary sectional perspective o a concrete! form.l

Iilg.y 2f is ay horizontal cross section of the same.

Fl@ 3` is aperspective of one of the movable clamping brackets-:thenormal type.

Fig. 4 is a perspective yof one of the supplementar-y clamping bracketswhich is used to tighten portions of the concrete form requiring this:-

Fig. 5 is a vertical cross section through a portion ofr the concreteform Where one of these last mentioned clamps is used.

Fig. 6` is a vertical section of amodification embodying a bolt fortightening in place of a wedge for a tasten-ingdevice.

The concrete form is built up of boards or punks l` which ordinarilywillbe vertically arrangedbut, of course, could be laid horizontally.Bolted tothese' planks is` a plurality of metal These straps' may bebolted to the outsidemoi the planks at the' top, bottom andmidfportions' or atv any other desirable location' on tho'plankl Eachstraphas a center portion bumped-out as at 3 tof form are'cess or socketto receive the tongue of the angle arm bracket 1 f i: 4l One end of thestrap is offset'outwardly as at- 5;.the other end 6 of the strapprojcotsfoutwardly to forma tenonwhich. nts into tenori groove formed bythe oiset portieriv 5.;

(Cl. 25-i13=1) the planks' up in the desired plane. Each strep memberhas al tongue-rceiving' Socket 3.l O1"- dinarily it will not benecessary to use a clamp on each plank beeau'sethe ten'on and tenori'groove arrangement of the s'tr'aps holds the planks in line and itisonly necessary to tie the planks and the timbers together every third orfourth plank., Hence, one of ythe brackets Will be dropped int'o' thetongue socket, as shown inv Fig. i. This angie arm bracket has atonfsue" portion 4 at one endand a turned-up portion 8 at the otherendg,v which I; shall designate the turned-up lug.` The web 9 rests inlfiorizoritaly position when thebrecket isl in piace. y es win readilyBe seen frjoni rig.l 1, the horizontal beaiii 4or timberflll canbedropped on these remove4 able brackets. `'reen the lii'fedgs il may bedriven` in place' between the vertical lug abutment 8 and the outsidefac'e of the timber or beam.` 'Ihis tightly draws the plank to which thestrap is attachedl against the beameiid the strap and the plank togetherdraw' the adjoining planks toward the' beam. l i l As already explained,it will not be necessary to use thebrackets except every three or fourplanks.l However', for cleariiess of showing' I have shown the strapslocated on every other however, that afterthe normal clampshave beentightened, one orrnore'L of the boards are still out yo'f line or out ofplane or loose. To meet' this situation I use another forni of bracketshown ir'rFig'. 4. Here the'angle arm bracket is formed just las thenormal bracket but it hasv i a loop formlottongue atthe socket and'designated 4d.. This tongue may be slipped in the tongue socket' 3 vfrom)beneath and,"consque'ntly, can b'e mounted on the job after thetimberhas been set in place and tightened'. This forni f ier'zielret,` ofcourse, `is of ne velue te' hola the timber' in place initially becauseit would drop out ofthe socket, but after the unibe;n or beam; has beenset and vclan'ipecl in place., if any part of the structure. is out oftrue this clamp can be readily slipped in place and a Wedge driven in totighten the structure adjacent that' partieu'lar plank. suene damp isshew'n in pierce at B`a in Fig, 1. The reference characters 45a, 9a and8aare used on this type bracket to designate, respectively, the tongue,the web andthe turned-up lug of the `c1arnp.

It will be seen from this" description that this clamping arrangement isextremely simple. The

straps attached to the boards or planks do not project any considerabledistance abovethe suri face of the plank and, consequently, the plankscan easily be stacked when not in use. The boards may be set up andmatched together with a minimum of trouble. Then the simple angle ironclamps may be dropped in place, the timbers set and then wedged intoplace simply by driving Wedges which can be made of wood or metal, asdesired. Then if it is found that any of the structure is out of line orout of true, all that is necessary is to place the supplemental anglearm brackets in place from below the timbers and drive the wedges home.

In Fig; 6 I have shown a modied form wherein a bolt is substituted forthe wedge. On the other end of this bolt is aswivelled plate I DI whichcommunicates the thrustof the bolt to the timber.

What I claim is:

1. Clamping and aligning means for concrete forms made up of planks,cross beams or timbers comprising, a plurality of straps, each straparranged to be set across a plank, the ends of the straps arranged tomatch together in interlocking position and .Z-shaped bracketsinterlocking with the strap lfor supporting a beam or timber andprovided with means for tying the beam or timber to the plank.- s

2. Clamping and aligning means for concrete forms made up of planks,cross beams or timber comprising, a plurality of straps,l each straparranged to be set across a plank, the ends of the straps arranged tomatch together in interlocking position and means interlocking with thestrap for supporting a beam or timber and tying the beam or timber totheplank comprising removable stamped metal Z-shaped brackets removablywedge driven` between the lbrackets. and the timber. 1

3. Clamping and aligning means for concrete forms made up of planks andcross beams or timber comprising, a pluralityy of straps, each ystraparranged to be set across a plank,v the ends of the straps arranged tomatch together in interlocking position and means interlocking with thestrap for supporting a beam or timber and tying the beam or timber tothe plank comprising angle arm brackets having each a turned-down tonguearranged to removablyinterlock with a strap on the plank and a turneduplug at the opposite end of the bracket with an interconnecting webportion arranged to support the timber or beam vand a fastening memberin between the timber and the turned-up lug. 4. Clamping and aligningmeans for concrete forms made up of planks and cross beams or timberscomprising, a plurality of straps, each v strap provided with abumped-out center portion forming a tongue socket and arranged to be setacross a plank, the ends oi' the straps arranged to match together ininterlocking position and means interlocking with the straps forsupporting a beam or timber and tying the beam or timber to the plankcomprising removable angle brackets each having at one end a turneddowntongue adapted to be yslipped into said tongue socket of astrapaturned-up outer end forming an upstanding lug and a fasteningmember arranged Ito ber driven in between the outside face of the timberand the lug to tie the the structure together. n

'5. .Clamping and aligning means for concrete forms made ,up of planksand cross beams orr timbers comprising a plurality ofv straps, eachstrap provided with a bumped-outcenter portion interlocking with thestraps andv forming a tongue socket and arranged to be set across a.plank, means interlocking with the strap for supporting a beam or timberand tyingy the beam or timber to the plank comprising removable bracketseach having at one end a turned-down tongue adapted to be slipped intosaid tongue socket of a strap, ,a turned-up outer end forming anupstanding lug and a fastening member' arranged to be driven in'betweenthe outside face of the timber and the lug to tie the structuretogether. g

6. Clamping and aligning means for concrete forms made up of planks andcross beams or timbers comprising, a plurality of straps, each strapprovided with a bumped-out center portion forming a tongue socket andarranged to be set across a plank, means interlocking with the strap forsupporting a beam or timber and tying the beam or timber to the plankcomprising removable brackets each having at one end a turned-downtongue adapted to be slipped into said tongue socket of a strap, aturned-up outer end forming an upstanding lug, a Wedge that strap at oneend having a tongue in the form of an angle arm arranged to be removablyhooked into the tongue socket and. having the other end can be driven inbetween the outside face of the timber and the lug to tie the structuretogether; a supplemental bracket having at one end an upturned lug andat the other` end a loop-like tongue member, the saidsupplementalbracket arranged to be slipped in place on the under Side' of the beamafter the beam has been set and tightened for the purpose of correctingirregularities in the form, together with a fastening member arrangedfor driving in between lthe upturned lug of the supplemental bracketand.

the beam. v

7.,C1amping and aligning means for concrete forms made up of uplanks andcross beams or' timbers comprising a. plurality of straps, each strapprovided with a bumped-out centerfportion forming a tongue socket andarranged to be set across a, plank, means interlocking with the strapfor supporting a beam or timber and tying thebeam or timber to the plankcomprising removable brackets each having at one end a turned-downtongue adapted to be slippedV into said tongue socket of a strap, aturned-up outer end forming an upstanding lug anda fastening memberbetween the outside face of the timber and the'lug to tie the structuretogether.

8. Clamping and aligning means for concrete forms made up of planks andcross-beamsfcomprising a plurality of straps, each `strap provided withan oset portion forming a tongue socket and arranged to be secured tothe outside of a plank and means interlocking with the strap forclamping the beam to the plank comprising removable brackets each having'atwith an offset portion forming 'a tongue socket Y and arranged to besecured to the outside of a plank and means interlocking with the strapsfor clamping the beam to the plank comprising removable brackets eachcomprising a sheet metal provided with means forming an abutment spacedfrom the plane of the outer face of the, beam and a removable wedgearranged to be driven in between the outer face of the beam and eachabutment to clamp the beam and planks together.

10. Clamping and aligning means for concrete forms made up of planks andcross-beams comprising a. plurality of straps, each strap provided withan offset portion forming a tongue socket and arranged to be secured tothe outside of a plank and means interlocking with the straps forclamping the beam to the plank comprising removable brackets each havingat one end a tongue in the form of an angle arm arranged to be slippedinto said tongue socket of the strap and having at the other end anabutment and a clamping member arranged 'to be engaged between the faceof the beam and each abutment to clamp the beam and planks together.

11. Clamping and aligningmeans for concrete forms made up of planks andcross-beams comprising a plurality of straps, each strap provided withan offset portion forming a tongue socket and arranged to be secured tothe outside of a plank and means interlocking with the straps forclamping the beam to the .plank comprising removable brackets eachcomprising a sheet metal strip at one end having a tongue in the form ofan angle arm arranged to be removably hooked into the tongue socket andhaving the other end provided with means forming an abutment spaced fromthe plane of the outer face of the beam and a clamping member arrangedto be engaged between the face of the beam and each abutment to clampthe beam and planks together.

l2. A clamp for concrete forms made up of planks and cross beams,comprising a socket member for securing to the outside face of a plank,a bracket havingu an angular portion adapted to hook into the socket andhaving at its outer end an abutment arranged to be spaced from the outerface of thebeam and a wedge arrang'ed to be `driven in between theabutment and `the outer face of the beam.

13. A clamp for concrete forms made up of planks and cross beams,comprising a socket member for securing to the outside face of a plank,a bracket having on angular portion arranged to hook into the socket andhaving at its outer end an abutment arranged to be spaced from the outerface of the beam and a spreading member arranged to engage between theabutment and the outer face of the-beam.

GEORGE H. STROBEN.

